* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Supplement Facts

As a dietary supplement, take one to four caplets daily on an empty stomach. For maximum support, take as directed everyday.

Serving Size 1 Vegetarian Caplets

Servings Per Container 60

Amount Per Serving

% DV

L-Tyrosine

1000.00 mg

**

** Daily Value (DV) not established

Other Ingredients: Cellulose, Povidone, Food Glaze

Distributed by: General Nutrition Corporation Pittsburgh, PA 15222

Health Notes

Disclaimer:
This scientific independent research is provided by Aisle7 and is for informational use only. GNC provides this information as a service but does not endorse it. Likewise, Aisle7 does not recommend or endorse any specific products.

For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.

Our proprietary "Star-Rating" system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.

For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.

This supplement has been used in connection with the following health conditions:

Dose: 150 mg for every 2.2 lbs (1 kg) of body weight, split into two doses taken before stressful activitiy (take the second dose 40 to 90 minutes after the first)Occasionally taking this amino acid before a stressful activity may help maintain your mental capacity.(more)

Depression

Dose:

Consult your doctor

Some people with depression have been found to improve with tyrosine.
(more)

Dose: 150 mg for every 2.2 lbs (1 kg) of body weight, split into two doses taken before stressful activitiy (take the second dose 40 to 90 minutes after the first)

Tyrosine is an amino acid used by the body to produce certain adrenal stress hormones and chemical messengers in the nervous system (neurotransmitters). Animal research shows that brain levels of these substances decline with stress, and that giving animals tyrosine supplements reverses this decline and improves various tests of performance in stressed animals.1 In a controlled study, a protein drink containing 10 grams per day of tyrosine was more effective than a carbohydrate drink for improving mental performance scores in a group of cadets taking a stressful six-day combat training course.2 A double-blind trial in humans found that one-time administration of 150 mg of tyrosine per 2.2 pounds of body weight helped prevent a decline in mental performance for about three hours during a night of sleep deprivation.3 Single administrations of tyrosine (100 to 150 mg per 2.2 pounds of body weight) have also helped preserve mental performance during physically stressful conditions such as noise or extreme cold in several controlled studies.4, 5, 6, 7

The amino acid L-tyrosine can be converted into norepinephrine, a neurotransmitter that affects mood. Women taking oral contraceptives have lower levels of tyrosine, and some researchers think this might be related to depression caused by birth control pills.1 L-tyrosine metabolism may also be abnormal in other depressed people2 and preliminary research suggests supplementation might help.3, 4 Several doctors recommend a 12-week trial of L-tyrosine supplementation for people who are depressed. Published research has used a very high amount-100 mg per 2.2 pounds of body weight (or about 7 grams per day for an average adult). It is not known whether such high amounts are necessary to produce an antidepressant effect.

L-tyrosine is a nonessential amino acid (protein building block) that the
body synthesizes from phenylalanine, another amino acid. Tyrosine is important
to the structure of almost all proteins in the body. It is also the precursor of
several neurotransmitters, including L-dopa, dopamine, norepinephrine, and
epinephrine.

The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2016.

Label

To view the Label you will need Adobe Acrobat Reader installed. You can download a free copy of the Adobe Acrobat Reader at: http://www.adobe.com/acrobat/readstep.html

Description:
Congitive Support Highest Grade Available Transports Fatty Acids
& Boots Cellular Energy Acetyl L Carnitine is a modified amino acid that supports cellular energy production by assisting in the transport of fat into the mitochondria where it is oxidized and ...

Description:
Supports repair & maintainance of tissue* Involved in
collagen formation* * These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.